Chain-stitch sewing-machine.



No,- 839,077. 1 l 1 V PATENTED DEG.18,}1906.

' LONDERDONK. Y

CHAIN STITCH SEWING MACHINE.

APPLICATION FILED MAY 21, 1901. 1

1 SHEETS-SHEET 1.

W/ TNE SSE S ,A TTOHNEXS/ No- 839,077. 7 PATENTED DEC. 18, 1906.

- L. ONDERDONK. I

CHAIN STITCH SEWING MACHINE.

v APPLIGATION FILE-D MAY 21. 1901.

4 SHEETS-SHEET 2;

WITNESSES A TTORNE S W/TNE sss u' r No. 839,077. PATENTED DEC. 18,- 1906.

L,0ND ERnoNK.- CHAINSTITGH SEWING MACHINE.

-APPLIOATION FILED MAY 21, 1901.

- INENTH Y Arrow/5g, v

4 SHEETS-SHEET 3.

PATENTED DEC. 18, 1906.

L. ONDERDONK. OHAIN STITCH SEWING MACHINE.

.APPLIOATION rum) MAY 21, 1901.

' 4 sums-sum 4.

WITNESSES:

A oRNEYs;

* ,UNIITED srA Es PATENT OFFICE. I

LANSING o DERoo K, or NEW YORK, N... Y., ASSIGNOR To UNION SPECIAL. sEwINc MACHINE oo;, or CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

To all whom it may concern:

f Be it known that I, LANSING OND'ERDONK,

a citizen of the; United States, residin at New'York, in the county of. New ork, State of New York, have invented certain new and useful Improvements in Chain- 'Stltch Sewing-Machines, of which the follow ing is a description, reference being had to the accompanying drawings and to the letters of reference marked thereon.

My nventlon relates to an 1m rovement In sewing-machines, and particu arl to ma- Where thebed-plate is in the form of a post.-

chines of that class known as orn-machime, in which the work is placed over a horn or cylindrical bed-plate containing a feeding -mecha'nism working longitudinally The main object of the resent invention Is to provide a machine aving improved means for driving the feeding and looper mechanisms.

Another object is to provide a machine of the type referred to in whichthe work shall be fed off the horn or bed-plateinstead of on v to the same, as is usualinmachines in which the feedworks longitudinally of the bedplate.

The present machine-is desi ned particu larly for sewing the overla pecl longitudinal edges of tubularly-arrange work, such as the legs of trousers, overalls, or the like or the sleeves or bodies of shirts, &c., the bed, late being so arranged that the work'is fed 0 the same, the rear end being arranged at the front of the machine and adjacent the o erator and the framework of the machine ein so constructed as to leave an-um'nterrupte space in which thehands of the operator may work toaproper'ly manipulate the material to be seWe The invention consists in the various matters, all as hereinafter described and referred I to in the appended claims.

The invention is illustrated inthe accompanying drawings, in which 5- my; im-

. proved machine. 'Flg. 2 is a plan wit the move Figure 1 is a perspectiveview of.

coverzplates, end cap, and" ooseneck re- Fig..-=3 Isaside elevation, the tubu- Specification of Letters Iatent. Application filed May 21.1901- s el'ial No. 61,272-

- gerated.

'the front case memberA. I members of the frame-casing are provlded with removable covers a, a and c In order CHAIN-STITCH'SEWINGLMACHINE.

Patented Dec. 18, 1906.

. I lar bed-plate being in longitudinal vertical section. Fig. 4 is a transverse vertical section on line 4 4 of Fi 3, thecover of the post bein removed. Tig. 5 is a front elevation'of t e main feed-bar-o crating lever. Figs. 6 and 7 are front and si e elevations of an auxiliary feed-bar-operating lever. Fig. 8 shows the eccentrics for actuating said-two levers. Fi 8 is a face view oflthe larger eccentric, s owing the wrist-pin and its ring. Fig. 9 is a detail view in perspective of the feed and 100 er operating devices, the spaceseparating t e' two mechanisms being exag- The machine-frame. comprises a hollow horizontal angular casing A, from the rear end of the member A of which rises the gooseneck B, which lies at right angles to the said case member A and parallel with the forward-case member A. At the left-hand end of the case member A rises the hollow post A, from the upper end of which pro'ects the rearwardly-extending cylindrical edlate or horn A, parallel with the case memer A, but in a hi her lane. The rear end of the bed-plate A has a removable end cap A which incloses the two loo'pers and the feed-dog to be presently described.

The upper tension mechanism, the needlebar N, Itsneedle-carrier n, and operatinglever N, the resser-foot P, andthe pres'serfootbar P areallof the usual construction and need not be described.

.. The horizontal drive-shaft C is mounted in bearings in the frame at the rear end of the member A and base of gooseneck B and has two cranks c c, to which are connected the rearends of the connecting-rods CC, which extend forwardly through the'ca'se member -A to thetwo cranks dd'on the ri ht-hand end of the line-shaft D, mounted in earings d in These different that the concealed parts may be cleaned,

oiled, &c.

The left-hand end of. the line or driven shaft D is within the lower end of post A rovided with twoeccentrics d d, and the ormer carries a wrist-pin d" in the form of a ball.

F designates the four-.motion feed-bar, mounted in bearing blocks or guideways ff withinthe top of the cylindrical bed-plate A and carrying at its rear end the feed-dog F, the work being fed off of the cylindricalbedplate or horn. Thefeed-bar F is pivotally connected at its rear or far end to verticallydisposed links f f, pivoted at their lower ends in the lower portionof the bedeplate or horn A ,'and the near or front end of the feed-barthat is, the end nearest the opera/ toris pivotally connected to the upper forked end f 2 of the main lever F the lower end of said lever being strapped to the larger eccentric d on shaft D. The lever F is further acted upon by the auxiliary lever F forked at its lower end f to straddle the smaller eccentric d of shaft D and split thereabove; as at f", and having a tightening-screw f to regulate the space between justably inan inclined vertically-disposed slot a in the post A (See Fig. 4.) By adjusting this bolt f 6 the throw ofthe feed-bar may be lengthened or shortenedto vary the stitch. It will be seen that the main lever F effects the raising and lowering of the front end of the feed-bar and also raises the lever F and that in the further rotation of the ec-. centrics d? d the auxiliary lever F will be rocked on its-axis f, so as to rock the main lever and impart the necessary longitudinal movement to the feed-bar F. The auxiliary lever F therefore forms a sliding and oscillating axis for the lever F L is the looper-shaft, mounted to slide and rock in the bearing-blocks f f below the feedbar F and provided at its far or rear end with two loopers Z Z, whichcoact in the ordinary manner with the two needles to form parallel rows of stitches. The nearor front end of the looper-shaft passes through the yoke f 2 of lever F and is then provided with a transverse operating-arm comprisin' a clamp l, rovided with a ball I, engage by a socket 3 on the upper end of the 10oper-operating lever .L, the lower end of the said lever having a socket 4 receiving the ball d, carried by the eccentrics d In order that the looper-shaft may have longitudinal or needle-avoiding movement in addition to the rocking or loop-taking and loop-leaving movement, I provide a transverse vei'tically-rocking tubular bearing L pivoted at l to a bracket a on the inside of the post A, and in this bearing slides the shank Z of the ball Z engaged by the socket Z on lever L just below socket Z. It will be seen that as the lower end of lever L is carried around by the wrist-pin (1 its upper end will rock the looper-sh-af-t and also oscillate on lDlTB ball Z, and so reciprocate the loo ershaft. One-half of each of the sockets P E" 18 formed in the removable cap Z", secured in place by the screw l In order that the position of the wrist-pin (i may be varied, it is mounted on a ring (1", let in an annular recess (1 formed in the face of the eccentric d and provided with a series of slots or openings (1 through certain of which pass the two attaching-screws d".

.The take-up mechanism for the lower threads comprises the grooved-cam H, the throw-off arm h, retaining-arm h and guides h 713, .as in the well-known Union Special machine. The intermittent stop device, comprising upper and lower springs I I, the lower one of which is closed against the upper by a cam I is also the same as in said machine.

The lower threads pass from the spools through the tension devices T,at the righthand end of the gooseneck, thence forwardly through the inclined tube U to the tube U on the u per edge of the front wall of the casing mem er A thence through the two eyes in a guide U just in advance of the nippersprings, and then between said springs to the take-up mechanism, from which the threads pass. upwardly out of the casing A through the vertically-extending tube U into the cylindrical bed or horn A, where they pass rear- .wardly through guide-apertures in the bearin -blocks f f (see Fig.2) to the loopers H.

t will be understood that so far as many of the features of this invention are concerned I do not wish to be limited to the exact details of construction shown nor to the exact type of machine sl'iown, whether a post or-post-cylinder machine, and various Inodi-. fications' and changes may be made without departing from the spirit of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A sewing-machine comprising a standard, a,horizontal member projecting therefrom, a vertical member rejecting from said horizontal member, a riving-shaft, and a line-shaft journaled in the horizontal member and operatively connected with the driving-shaft, a feeding mechanism comprising a main feed-operating lever arranged within said vertical member, and operatively connected at its lower end with said shaft, an

auxiliary lever pivoted at its upper end to the main feed-operating lever, and at its lower end operatively connected to said shaft, and a looper-operating lever also arran ed within said vertical member; substantialfy as described.

2. A sewing-machine, comprisin a casing or framework, a driving-shaft journa ed therein, said casing having. a horizontal and a vertical member, and a line-shaft journaled in the horizontal member and operatively IIO ' at itslower end with said line-shaft, an auxconnected with the driving shaft,'a main feed-operatin lever, arranged within said vertical mem er, and operatively connected iliary lever pivoted at its upper end to'the main feed operati'ng lever, and at-rits lower end operatively connected to said line-shaft, a looper-support and a looper-operating lever connected at its lower end also to said line-shaft; and at its upper end to the loopersupport, said auxilia erating' lever bein so located within the vertical member 0 the casing or framework, substantially as described.

\ 3. A sewing-machine, comprising a casing or framework having a horizontal and a vertical member, and a shaftjournaled in the horizontal member, a feeding mechanism, comprising a main feed operating lever operatively connected at its lower end to the said shaft, an auxiliary lever slidingly pivoted between its ends to the vertical member, pivoted at its upper end to the main feed-operating lever, and at its lower end operatively connected to said shaft, a looper-shaft at the upperend of the vertical member, and a looper-operating lever connected at its lower end to said shaft, and at its upper. end pivotally connected to the looper-supporting shaft; substantially as described. I Y

4. A sewing-machine, comprising a casing or franiework having a horizontal and a vertical member, and a shaft journaled in the horizontal member, a feeding mechanism.

comprising a main feed-operating lever operatively connected at its lower end to the said shaft, an auxiliary lever slidingly pivoted between its ends to the vertical Yr ember, pivotedat its upper end to the main feedoperat" ing lever, and at its. lower end operatively connected to said shaft, a looper-shaft at'the upper' end of the vertical member, and a looper-operating lever connected at its lower end to said shaft, and at its upper end piv otally connected to the looper-supporting shaft, and having a pivotal and sliding connection below the looper-shaft, with said ver. tical frame; member; substantially as described. v

5. A sewing-machine comprising a casing or framework, having a horizontal anda ver-v tical member, and a shaft journaled in the horizontal member, a feeding mechanism,

comprising a main feed-operating, lever op-' eratively connected at its lower end to the said shaft, an auxiliar'y lever pivoted at its upper end tothe main feed-o erating lever, and at its lower end operative y connected to 1 said shaft, a looper-shaft at the upper end of tic the vertical member, and alooper-operating lever connected at its lower end to said shaft,

and at its upper end pivotally connected to the looper-supporting shaft; substantially as described.

lever and looper-op-' 6. A sewing-machine, comprising a casing or framework'having a horizontal and a vertical member, and a shaft journaled in the horizontal member, a feeding mechanism,

comprising a main feed-operating lever o eratively connected at its lower end to t e said shaft, an auxiliary lever, pivoted at its upper end to the'main feed-operating lever,

and at its lower end operatively connected to said shaft, a looper-shaft at the upper end of thevertical member, and a looper-operating lever connected at'its lower end to said shaft, and at its upper end pivotally connected to the looper-sup orting shaft, and having a ivotal and s iding connection below the ,ooper-shaft, with said vertical frame member; substantially as described.

7 A sewing-machine comprising, a casing or framework having a horizontal and a vertical member, and a shaft'journaledin the horizontal member, and provided at the base of the vertical member with two cams or eccentricsand a wrist-pin, of a main feed-open ating lever connected at its lower end to one of said'cams or eccentrics, an auxiliary lever .slidingly pivoted between its ends to vertical base member, pivoted at its upper end to the main. feed-operating lever, and embracing with its lowerforkedor slotted end the other of said cams or eccentrics, and a looper mechanism operatively connected with the wristpin; substantially as described. v8. Asewing-machin'e, comprising a casing or framework, having a horizontal and a vertical member, and having atthe base of the vertical member two cams or eccentrics, and a Wrist-pin, a feeding mechanismoperated by'connections with the cams or eccentrics, a looper-shaft at the up er end of the vertical base member, an d a ooper-operating lever- .connected at itslower end to said wrist-pin,

ivotally connected at its upper end to the ooper-shaft, and having a pivoted and sliding connection below the looper-shaft, with said vertical frame member; substantiallyas described.

"9. In'a sewing-machine, a cylindrical casing or bed-plate, extending from front to rear of the machine, a feeddogcarrying bar arof the vertical member with two cams or ecslidingly pivoted between its ends to the vercentrics and a wrist-pin, of a main feed-operl ism operetively connected with the wristating lever connected at its lower end to one pin; substantially as described. 10 of said cams or eccentrics, an auxiliary lever In testimony whereof I alfix my signature in presence of two witnesses.

LANSING ONDERDONK.

tical member, pivoted at its upper end to i the main feed-operating lever and operatively l Witnesses: connected at its lower end to the other of F. A. NORTH,

said cams or eccentrics and a looper mechan- M. VAN WAGNER. 

